Open Access
Table 1
M3DIS RHD code features.
| Feature | Description |
|---|---|
| Code name | M3DIS – Models in 3D @DISPATCH (Eitner et al. 2024; Nordlund et al. 2018) |
| Dimensionality | Full 3D |
| Physics included | Radiation and convection |
| Applications | FGKM stars; any log g; any metallicity |
| Opacity sources | 92 elements; electron and Rayleigh scattering; molecules |
| Boundary conditions | Top: open, in-/outflows, exponential ρ drop, constant e/m; Bottom: open, outflows free, inflows maintain entropy (via ghost zones) |
| Time integration | Explicit; local time step based on the Courant–Friedrichs–Lewy (CFL) condition from gas velocity, radiative heating and radiative diffusion |
| Grid type | Eulerian; uniform in all directions |
| Hydrodynamics solver | HLLC Riemann solver (Fromang et al. 2006) |
| Radiative transfer | Short-characteristics; conservative on staggered mesh; 8 frequency bins; 4 ϕ, 2 μ angles, plus disk-centre rays |
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